Question

X sobre 2 + 2x -15 =0

Answer 1

Resposta:

A = 1 B = 2 C = -15

Δ = B2 - 4.A.C

Δ = 22 - 4.1.(-15)

Δ = 4 + 60

Δ = 64

X = -B +- √Δ / 2.A

X = -2 +- √64 / 2.1

X = -2 +- 8 / 2

X| = -2 + 8 / 2

X| = 6 / 2

X| = 3

X|| = -2 - 8 / 2

X|| = -10 / 2

X|| = -5